Garbage-digester.



No. 773,150. PATENTED OUT. 25, 1904. G. B. KUGLER & A. MORRISON.

' GARBAGE DIGESTER.

APPLIOATION FILED APB..2.-1903.

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UNITED STATES Patented October 25, 1904.

PATENT OFFICE.

CLARENCE B. KUGLER AND ANGUS MORRISON, OF PHILADELPHIA, PENN- SYLVANIA, ASSIGNORS OF ONE-THIRD TO R. WALTER PETERSON, OF

PHILADELPHIA, PENNSYLVANIA.

GARBAGE-DIGESTER.

SPECIFICATION forming part of Letters Patent No. 773,150, dated October 25, 1904. Application filed April 2, 1903- Serial No. 150,708. (No model.)

To all whom it may concern:

' Be it known that we, CLARENoE B. KUGLER and ANeUs MORRISON, of the city of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Garbage-Digesters, whereof the following is a specification, reference being had to the accompanying drawings.

Our invention relates to apparatus for treat- IO ing garbage, offal, or similar material to'separate the grease from the residue by mixing steam with said material in a closed chamber, and thus cooking it. Such a chamber being formed in an iron or steel shell, it is found in practice that the action of steam on garbage, &c., produces or liberates corrosive liquids and vapors, which rapidly destroy such shells when the latter are 'leftunpr'otected.

Therefore it is the object of our invention to provide a protective lining for a digester of the class specified whereby its life may be prolonged; and the form of our invention hereinafter described comprises a verticallydisposed cylindrical metal shell, forming the body portion of the digester, provided with a wooden lining, the arched head and conical bottom of said shell being conveniently provided with linings of refractory material.

Our invention comprises the various novel 3 features of construction and arrangement herein set forth.

In said drawings, Figure I is a vertical sectional view of a digester conveniently embodying our improvements. Fig. II is an inverted plan sectional view of said digester, taken-on the line II II in Fig. I. Fig. III is a plan sectional view of said digester, taken on the line III III in Fig. I.

In said figures the cylindrical metal shell 1 4 forms the body portion of the digester, which is provided with brackets 2, by which it is supported in vertical position. The arched head 4 of said shell comprises the garbage-inlet 5, provided with the lid 6, which is hinged on the pintle 8 and arranged to be tightly closed by bolts 9 and nuts 10 during the cooking operation. The bracket 11, attached to said pintle 8, is arranged to support said lid 6 in opened position during the introduction of the material to be treated. The conical bottom 13 of said shell 1 comprises the outlet 14, controlled by the gate valve 15, through which the residue of the treated garbage isdischarged after being cooked by steam introduced at the bottom of the digeste r through the steam-inlet 16, conveniently controlled by the valve 17. Said shell 1 is provided with the wooden lining conveniently consisting of two vided with a protective lining of refractory material, conveniently consisting of slabs 27 and 28 of concrete, each slab being provided with a bolt 29, whose head 30 is provided with a washer-plate 32and embedded therein, as indicated. Said bolts 29 extend through the head 4 and are provided exterior to the latter with the nuts 33. It being found in practice that the corrosive action aforesaid is greatest in the upper half of the digester, the slabs 28 are made to overlap the slabs 27 and the top ends of the staves 19, so as to prevent access of the corrosive vapors, &c., to the joints between said head and shell.

The conical bottom 13 of the digester is also provided with a protective lining of refractory material, conveniently consisting of terra-cotta slabs or bricks 35.

Our improved digester is conveniently employed in the treatment of garbage, as follows: The gate-valve 15 being closed and the lid 6 being opened, the mass of material to be treated is introduced through the inlet 5. Said lid 6 being then tightly closed by the swing-bolts 9 and nuts 10, steam is introduced at the bottom of the mass through the steaminlet 16, controlled by the valve 17. The cooking operation is then allowed to proceed until the fatty portion of the material is separated from the residue and rises to the top of the digester and is terminated by closing the valve 17 Thereafter the gate-valve 15 is opened, the cooked material discharged, and the operation repeated.

The characteristic feature of our invention being the provision of a wooden lining in a digester of the class specified, We do not desire to limit ourselves to the precise details of construction and arrangement of our improvements herein set forth, as it is obviousthat various modifications may be madetherein without departing from the essential feature of our invention.

We claim- 1. In a garbage-digester, the combination with a metal shell; of a wooden lining; metal hoops arranged inside of said lining; and, bolts extending through said hoops, lining and shell, arranged to retain said lining, substantially as set forth.

2. In a garbage-digester, the combination with a metal shell comprising a cylindrical body, a conical bottom and an arched head; of a Wooden lining attached to said cylindrical body; and, linings of refractory material secured in said conical bottom and arched head, substantially as set forth.

3. In a garbage-digester, the combination with a metal shell comprising a cylindrical body, a conical bottom and an arched head; of a wooden lining attached to said cylindrical body; a brick lining in said conical bottom; and, a concrete lining in said arched head, substantially as set forth.

4. In a garbage-digester, the combination with a metal shell comprising a cylindrical body, a tapered bottom portion and an arched head; of a wooden lining in said body; metal hoops extending circumferentially inside of said wooden lining; bolts extendmg through said hoops, lining and shell and binding them together; a lining of refractory material in said bottom; and, a lining of concrete slabs in said arched head; said slabs having interlocked joints and overlapping the upper end of said Wooden lining; whereby the metal shell and arched head are protected from injurious vapors, substantially as set forth.

5. In a garbage-digester, the combination with a metal shell comprising a cylindrical body, a bottom and ahead; of a non-corrosive lining for said shell, comprising wooden slabs attached to said cylindrical body and concrete slabs attached to said head, substantially as set forth.

6. In a garbage-digester, the combination with a metal shell, comprising a cylindrical body, a bottom and a head; of a non-corrosive lining for said shell, comprising wooden slabs attached to said cylindrical body and bricks in said bottom, substantially as set forth.

7 Ina garbage-digester, the combination with a metal shell comprising a cylindrical body, a bottom and a head; of a non-corrosive lining for said shell, comprisingawooden covering in said cylindrical body, and, a covering of refractory material in said head and bottom, substantially as set forth.

In testimony whereof we have hereunto signed our names, at Philadelphia, Pennsylvania, this 1st day of April, 1903.

CLARENCE B. KUGLER. ANGUS MORRISON. Witnesses:

R. WALTER PETERSON, F. D. PETERSON. 

